Comment 12 for bug 286906

(In reply to comment #5)
> We're already changing API incompatibly:
>
> http://bit.ly/3mJBqR
>
> Other possible changes include OOM handling, but this one looks like it won't
> change for the API users:
>
> http://bit.ly/1AjSUj
>
> We definitely want to change the GC rooting API, and add a write barrier:
>
> https://wiki.mozilla.org/JavaScript:SpiderMonkey:GC_Futures

All these things happened or will happen in trunk. I don't think any of them are likely to be backported to a stable branch.

If we ever do want to backport a breaking change to a stable branch, we could just bump the major version number. But that has not happened much in the past and I don't expect it to happen much in the future.